package/qextserialport: remove qt4 support

Qt4 support is about to be dropped, so remove the support from
qextserialport as well.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/qextserialport/Config.in

@@ -1,6 +1,6 @@
 config BR2_PACKAGE_QEXTSERIALPORT
 	bool "qextserialport"
-	depends on BR2_PACKAGE_QT || BR2_PACKAGE_QT5
+	depends on BR2_PACKAGE_QT5
 	help
 	  A Qt library to manage serial ports
 

package/qextserialport/qextserialport.mk

@@ -14,16 +14,10 @@ ifeq ($(BR2_STATIC_LIBS),y)
 QEXTSERIALPORT_CONF_OPTS += CONFIG+=qesp_static
 endif
 
-ifeq ($(BR2_PACKAGE_QT),y)
-QEXTSERIALPORT_DEPENDENCIES += qt
-QEXTSERIALPORT_QMAKE = $(QT_QMAKE)
-else ifeq ($(BR2_PACKAGE_QT5),y)
-QEXTSERIALPORT_DEPENDENCIES += qt5base
-QEXTSERIALPORT_QMAKE = $(QT5_QMAKE)
-endif
+QEXTSERIALPORT_DEPENDENCIES = qt5base
 
 define QEXTSERIALPORT_CONFIGURE_CMDS
-	cd $(@D); $(TARGET_MAKE_ENV) $(QEXTSERIALPORT_QMAKE) $(QEXTSERIALPORT_CONF_OPTS)
+	cd $(@D); $(TARGET_MAKE_ENV) $(QT5_QMAKE) $(QEXTSERIALPORT_CONF_OPTS)
 endef
 
 define QEXTSERIALPORT_BUILD_CMDS